<http://schema.org/category>
"Travel Trailer"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.rvusa.com/rvs-for-sale/2017/cruiser-rv-travel-trailer-touring-28bhik-bunk-model-rv-for-sale-wext-kitche-travel-trailer-new-alvarado-texas-76009-1916031>